• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Lilium superbum (Ixc/d)

Turk's cap lily

  • Other common names Turk's cap lily
    great American Turk's cap lily

    swamp lily
    Turk's head lily

    see more
  • Family Liliaceae

  • Genus Lilium are bulbous perennials with erect stems bearing whorled or spirally arranged leaves and terminal racemes or umbels of bowl-shaped, trumpet-shaped, funnel-shaped or turks cap shaped flowers, often fragrant, and white, yellow, orange or red

  • Details L. superbum is a vigorous stem-rooting lily with purple-mottled green stems and linear bright green leaves; in late summer and early autumn it produces long racemes of up to 40 pendent turkscap flowers, to 7cm across, with red-flushed orange tepals, green towards the bases and spotted maroon

  • Plant range E United States

Characteristics

  • Foliage Deciduous

  • Habit Columnar/Upright

  • Hardiness

    Hardiness ratings

    All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

    • H1a - Under glass all year (>15C)
    • H1b - Can be grown outside in the summer (10 - 15)
    • H1c - Can be grown outside in the summer (5 - 10)
    • H2 - Tolerant of low temperatures, but not surviving being frozen (1 to 5)
    • H3 - Hardy in coastal and relatively mild parts of the UK (-5 to 1)
    • H4 - Hardy through most of the UK (-10 to -5)
    • H5 - Hardy in most places throughout the UK even in severe winters (-15 to -10)
    • H6 - Hardy in all of UK and northern Europe (-20 to -15)
    • H7 - Hardy in the severest European continental climates (< -20)

    H6

Colour

Sunlight

  • Full Sun

  • Partial Shade

  • Aspect South-facing or West-facing or East-facing

  • Exposure Exposed or Sheltered

Soil

  • Loam

    Loam

  • Sand

    Sand

  • MoistureWell-drained

  • SoilLoam, Sand

  • pHAcid, Neutral

Size

  • Ultimate height 1.5-2.5 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in neutral to acid well-drained soil enriched with leaf mould or well-rotted organic matter

Propagation Propagate by seed, sown, when ripe, in containers in a cold frame or separate offsets after the foliage dies down

Suggested planting locations and garden types Cut Flowers Flower borders and beds Wall-side Borders Patio & Container Plants City & Courtyard Gardens Coastal Wildflower meadow

How to care

Pruning No pruning required

Pests May be attacked by lily beetle, aphids and slugs; plants in pots are susceptible to vine weevil

Diseases Grey moulds and a virus may cause problems, see lily diseases

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